This is what the purple air sensors are sometimes referred to.
This morning raw PM2.5 data was 45 for a 10 minute average in Witset. Well above recommended levels, again. I waited outside for a bus like other adults and kids. The high lines on the chart above show Witset levels. The lower line, green and blue shows that near the base of the mountain there was very low levels at that same time.
Its a well known fact that not just location but socio economic factors effect heath outcomes when it comes to clean air.
Here is the visual:
Here is just one research paper on the topic: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4626327/